<template>
  <div class="container">
    <div class="left-board">
      <div class="logo-wrapper">
        <div class="logo">
          <el-page-header
            content="表单设计"
            @back="goproductpage()"
          ></el-page-header>
          <!--<img :src="logo" alt="logo" />
          Form Generator
          <a
            class="github"
            href="https://github.com/JakHuang/form-generator"
            target="_blank"
          >
            <img src="https://github.githubassets.com/pinned-octocat.svg" alt />
          </a>-->
        </div>
      </div>
      <el-scrollbar class="left-scrollbar">
        <div class="components-list">
          <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
            <div class="components-title">
              <svg-icon icon-class="component" />
              {{ item.title }}
            </div>
            <draggable
              class="components-draggable"
              :list="item.list"
              :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
              :clone="cloneComponent"
              draggable=".components-item"
              :sort="false"
              @end="onEnd"
            >
              <div
                v-for="(element, index) in item.list"
                :key="index"
                class="components-item"
                @click="addComponent(element)"
              >
                <div class="components-body">
                  <svg-icon :icon-class="element.__config__.tagIcon" />
                  {{ element.__config__.label }}
                </div>
              </div>
            </draggable>
          </div>
        </div>
      </el-scrollbar>
    </div>

    <div class="center-board">
      <div class="action-bar" style="display: none">
        <el-button icon="el-icon-video-play" type="text" @click="run">
          运行
        </el-button>
        <el-button icon="el-icon-view" type="text" @click="showJson">
          查看json
        </el-button>
        <el-button icon="el-icon-download" type="text" @click="download">
          导出vue文件
        </el-button>
        <el-button
          class="copy-btn-main"
          icon="el-icon-document-copy"
          type="text"
          @click="copy"
        >
          复制代码
        </el-button>
        <el-button
          class="delete-btn"
          icon="el-icon-delete"
          type="text"
          @click="empty"
        >
          清空
        </el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form
            :size="formConf.size"
            :label-position="formConf.labelPosition"
            :disabled="formConf.disabled"
            :label-width="formConf.labelWidth + 'px'"
          >
            <draggable
              class="drawing-board"
              :list="drawingList"
              :animation="340"
              group="componentsGroup"
            >
              <draggable-item
                v-for="(item, index) in drawingList"
                :key="item.renderKey"
                :drawing-list="drawingList"
                :current-item="item"
                :index="index"
                :active-id="activeId"
                :form-conf="formConf"
                @activeItem="activeFormItem"
                @copyItem="drawingItemCopy"
                @deleteItem="drawingItemDelete"
              />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <right-panel
      :active-data="activeData"
      :form-conf="formConf"
      :show-field="!!drawingList.length"
      @tag-change="tagChange"
      @fetch-data="fetchData"
    />

    <form-drawer
      :visible.sync="drawerVisible"
      :form-data="formData"
      size="100%"
      :generate-conf="generateConf"
    />
    <json-drawer
      size="60%"
      :visible.sync="jsonDrawerVisible"
      :json-str="JSON.stringify(formData)"
      @refresh="refreshJson"
    />
    <code-type-dialog
      :visible.sync="dialogVisible"
      title="选择生成类型"
      :show-file-name="showFileName"
      @confirm="generate"
    />
    <input id="copyNode" type="hidden" />
  </div>
</template>

<script>
  import draggable from 'vuedraggable'
  import { debounce } from 'throttle-debounce'
  import { saveAs } from 'file-saver'
  import ClipboardJS from 'clipboard'
  import render from '@/components/render/render'
  import FormDrawer from './FormDrawer'
  import JsonDrawer from './JsonDrawer'
  import RightPanel from './RightPanel'
  import {
    inputComponents,
    selectComponents,
    layoutComponents,
    formConf,
  } from '@/components/generator/config'
  import {
    exportDefault,
    beautifierConf,
    isNumberStr,
    titleCase,
    deepClone,
    isObjectObject,
  } from '@/utils/form/index'
  import {
    makeUpHtml,
    vueTemplate,
    vueScript,
    cssStyle,
  } from '@/components/generator/html'
  import { makeUpJs } from '@/components/generator/js'
  import { makeUpCss } from '@/components/generator/css'
  import drawingDefalut from '@/components/generator/drawingDefalut'
  import logo from '@/assets/logo.png'
  import CodeTypeDialog from './CodeTypeDialog'
  import DraggableItem from './DraggableItem'
  import {
    getDrawingList,
    saveDrawingList,
    getIdGlobal,
    saveIdGlobal,
    getFormConf,
  } from '@/utils/form/db'
  import loadBeautifier from '@/utils/form/loadBeautifier'

  let beautifier
  const emptyActiveData = { style: {}, autosize: {} }
  let oldActiveId
  let tempActiveData
  const drawingListInDB = getDrawingList()
  const formConfInDB = getFormConf()
  const idGlobal = getIdGlobal()
  //render,
  export default {
    components: {
      draggable,
      FormDrawer,
      JsonDrawer,
      RightPanel,
      CodeTypeDialog,
      DraggableItem,
    },
    props: {
      infoData: {
        type: Object,
        default: () => {
          return {}
        },
      },
    },
    data() {
      return {
        logo,
        idGlobal,
        formConf,
        inputComponents,
        selectComponents,
        layoutComponents,
        labelWidth: 100,
        drawingList: drawingDefalut,
        drawingData: {},
        activeId: drawingDefalut[0].formId,
        drawerVisible: false,
        formData: {},
        dialogVisible: false,
        jsonDrawerVisible: false,
        generateConf: null,
        showFileName: false,
        activeData: drawingDefalut[0],
        saveDrawingListDebounce: debounce(340, saveDrawingList),
        saveIdGlobalDebounce: debounce(340, saveIdGlobal),
        leftComponents: [
          {
            title: '输入型组件',
            list: inputComponents,
          },
          {
            title: '选择型组件',
            list: selectComponents,
          },
          {
            title: '布局型组件',
            list: layoutComponents,
          },
        ],
      }
    },
    computed: {},
    watch: {
      // eslint-disable-next-line func-names
      'activeData.__config__.label': function (val, oldVal) {
        if (
          this.activeData.placeholder === undefined ||
          !this.activeData.__config__.tag ||
          oldActiveId !== this.activeId
        ) {
          return
        }
        this.activeData.placeholder =
          this.activeData.placeholder.replace(oldVal, '') + val
      },
      activeId: {
        handler(val) {
          oldActiveId = val
        },
        immediate: true,
      },
      drawingList: {
        handler(val) {
          this.saveDrawingListDebounce(val)
          if (val.length === 0) this.idGlobal = 100
        },
        deep: true,
      },
      idGlobal: {
        handler(val) {
          this.saveIdGlobalDebounce(val)
        },
        immediate: true,
      },
    },
    mounted() {
      if (Array.isArray(drawingListInDB) && drawingListInDB.length > 0) {
        this.drawingList = drawingListInDB
      } else {
        this.drawingList = drawingDefalut
      }
      this.activeFormItem(this.drawingList[0])
      if (formConfInDB) {
        this.formConf = formConfInDB
      }
      loadBeautifier((btf) => {
        beautifier = btf
      })
      const clipboard = new ClipboardJS('#copyNode', {
        text: (trigger) => {
          const codeStr = this.generateCode()
          this.$notify({
            title: '成功',
            message: '代码已复制到剪切板，可粘贴。',
            type: 'success',
          })
          return codeStr
        },
      })
      clipboard.on('error', (e) => {
        this.$message.error('代码复制失败')
      })
    },
    methods: {
      goproductpage() {
        //console.log(this.infoData)
        this.AssembleFormData()
        this.formData.formBtns = false
        const definefomr = JSON.stringify(this.formData)
        this.generateConf = { fileName: '1643265760598.vue', type: 'file' }
        const vuecode = this.execGetVueFileHtml()
        this.$confirm('是否需要保存？', '提示', {
          type: 'warning',
        })
          .then(() => {
            this.$emit('change-step', 1, {
              vuecodeStr: vuecode,
              record: this.infoData,
              formGsonStr: definefomr,
              formname: this.formData.formRef,
            })
          })
          .catch(() => {
            //this.$emit('change-step', 1)
            this.$emit('change-step', 1, {})
          })
      },
      setObjectValueReduce(obj, strKeys, data) {
        const arr = strKeys.split('.')
        arr.reduce((pre, item, i) => {
          if (arr.length === i + 1) {
            pre[item] = data
          } else if (!isObjectObject(pre[item])) {
            pre[item] = {}
          }
          return pre[item]
        }, obj)
      },
      setRespData(component, resp) {
        const { dataPath, renderKey, dataConsumer } = component.__config__
        if (!dataPath || !dataConsumer) return
        const respData = dataPath
          .split('.')
          .reduce((pre, item) => pre[item], resp)

        // 将请求回来的数据，赋值到指定属性。
        // 以el-tabel为例，根据Element文档，应该将数据赋值给el-tabel的data属性，所以dataConsumer的值应为'data';
        // 此时赋值代码可写成 component[dataConsumer] = respData；
        // 但为支持更深层级的赋值（如：dataConsumer的值为'options.data'）,使用setObjectValueReduce
        this.setObjectValueReduce(component, dataConsumer, respData)
        const i = this.drawingList.findIndex(
          (item) => item.__config__.renderKey === renderKey
        )
        if (i > -1) this.$set(this.drawingList, i, component)
      },
      fetchData(component) {
        const { dataType, method, url } = component.__config__
        if (dataType === 'dynamic' && method && url) {
          this.setLoading(component, true)
          this.$axios({
            method,
            url,
          }).then((resp) => {
            this.setLoading(component, false)
            this.setRespData(component, resp.data)
          })
        }
      },
      setLoading(component, val) {
        const { directives } = component
        if (Array.isArray(directives)) {
          const t = directives.find((d) => d.name === 'loading')
          if (t) t.value = val
        }
      },
      activeFormItem(currentItem) {
        this.activeData = currentItem
        this.activeId = currentItem.__config__.formId
      },
      onEnd(obj) {
        if (obj.from !== obj.to) {
          this.fetchData(tempActiveData)
          this.activeData = tempActiveData
          this.activeId = this.idGlobal
        }
      },
      addComponent(item) {
        const clone = this.cloneComponent(item)
        this.fetchData(clone)
        this.drawingList.push(clone)
        this.activeFormItem(clone)
      },
      cloneComponent(origin) {
        const clone = deepClone(origin)
        const config = clone.__config__
        config.span = this.formConf.span // 生成代码时，会根据span做精简判断
        this.createIdAndKey(clone)
        clone.placeholder !== undefined && (clone.placeholder += config.label)
        tempActiveData = clone
        return tempActiveData
      },
      createIdAndKey(item) {
        const config = item.__config__
        config.formId = ++this.idGlobal
        config.renderKey = `${config.formId}${+new Date()}` // 改变renderKey后可以实现强制更新组件
        if (config.layout === 'colFormItem') {
          item.__vModel__ = `field${this.idGlobal}`
        } else if (config.layout === 'rowFormItem') {
          config.componentName = `row${this.idGlobal}`
          !Array.isArray(config.children) && (config.children = [])
          delete config.label // rowFormItem无需配置label属性
        }
        if (Array.isArray(config.children)) {
          config.children = config.children.map((childItem) =>
            this.createIdAndKey(childItem)
          )
        }
        return item
      },
      AssembleFormData() {
        this.formData = {
          fields: deepClone(this.drawingList),
          ...this.formConf,
        }
      },
      generate(data) {
        //console.log(data)
        const func = this[`exec${titleCase(this.operationType)}`]
        this.generateConf = data
        //console.log(this.generateConf)
        func && func(data)
      },
      execRun(data) {
        this.AssembleFormData()
        this.drawerVisible = true
      },
      execDownload(data) {
        const codeStr = this.generateCode()
        const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
        saveAs(blob, data.fileName)
      },
      execGetVueFileHtml(data) {
        const codeStr = this.generateCode()
        return codeStr
      },
      execCopy(data) {
        document.getElementById('copyNode').click()
      },
      empty() {
        this.$confirm('确定要清空所有组件吗？', '提示', {
          type: 'warning',
        }).then(() => {
          this.drawingList = []
          this.idGlobal = 100
        })
      },
      drawingItemCopy(item, list) {
        let clone = deepClone(item)
        clone = this.createIdAndKey(clone)
        list.push(clone)
        this.activeFormItem(clone)
      },
      drawingItemDelete(index, list) {
        list.splice(index, 1)
        this.$nextTick(() => {
          const len = this.drawingList.length
          if (len) {
            this.activeFormItem(this.drawingList[len - 1])
          }
        })
      },
      generateCode() {
        const { type } = this.generateConf
        this.AssembleFormData()
        const script = vueScript(makeUpJs(this.formData, type))
        const html = vueTemplate(makeUpHtml(this.formData, type))
        const css = cssStyle(makeUpCss(this.formData))
        return beautifier.html(html + script + css, beautifierConf.html)
      },
      showJson() {
        this.AssembleFormData()
        this.jsonDrawerVisible = true
      },
      download() {
        this.dialogVisible = true
        this.showFileName = true
        this.operationType = 'download'
      },
      run() {
        this.dialogVisible = true
        this.showFileName = false
        this.operationType = 'run'
      },
      copy() {
        this.dialogVisible = true
        this.showFileName = false
        this.operationType = 'copy'
      },
      tagChange(newTag) {
        newTag = this.cloneComponent(newTag)
        const config = newTag.__config__
        newTag.__vModel__ = this.activeData.__vModel__
        config.formId = this.activeId
        config.span = this.activeData.__config__.span
        this.activeData.__config__.tag = config.tag
        this.activeData.__config__.tagIcon = config.tagIcon
        this.activeData.__config__.document = config.document
        if (
          typeof this.activeData.__config__.defaultValue ===
          typeof config.defaultValue
        ) {
          config.defaultValue = this.activeData.__config__.defaultValue
        }
        Object.keys(newTag).forEach((key) => {
          if (this.activeData[key] !== undefined) {
            newTag[key] = this.activeData[key]
          }
        })
        this.activeData = newTag
        this.updateDrawingList(newTag, this.drawingList)
      },
      updateDrawingList(newTag, list) {
        const index = list.findIndex(
          (item) => item.__config__.formId === this.activeId
        )
        if (index > -1) {
          list.splice(index, 1, newTag)
        } else {
          list.forEach((item) => {
            if (Array.isArray(item.__config__.children))
              this.updateDrawingList(newTag, item.__config__.children)
          })
        }
      },
      refreshJson(data) {
        this.drawingList = deepClone(data.fields)
        delete data.fields
        this.formConf = data
      },
    },
  }
</script>

<style lang="scss">
  @import '@/styles/home';
</style>
